<template>
  <div class="component-upload-image">
    <el-upload :action="uploadFileUrl" list-type="picture-card" :before-upload="handleBeforeUpload" :file-list="fileList" :limit="props.limit"
      :on-error="handleUploadError" :on-success="handleUploadSuccess" :show-file-list="false" :headers="headers" :on-exceed="handleExceed  "
      class="upload-file-uploader" ref="fileUpload" >
      <!--  :on-exceed="handleExceed  " :on-change="handleChange" multiple-->
      <el-icon class="avatar-uploader-icon" v-if="fileList.length==0">
        <plus />
      </el-icon>
     <template v-if="fileList.length>0">
        <div v-for="(file,i) in fileList" :key="file.uid" class="upload-custom">
          <el-icon class="file-size">
            <Files />
          </el-icon>{{ file.originalFilename }}
          <div class="upload-mask">
            <span @click.stop="previewFun(file)"><el-icon><zoom-in /></el-icon></span>
            <span @click.stop="delView(file)" v-if="props.disabled"><el-icon><Delete /></el-icon></span>
          </div>
        </div>
      </template>

      
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>
    <!-- 文件列表 -->
    <!-- <transition-group class="upload-file-list el-upload-list el-upload-list--text" name="el-fade-in-linear" tag="ul">
        <li :key="file.uid" class="el-upload-list__item ele-upload-list__item-content" v-for="(file, index) in fileList">
          <el-link :href="`${baseUrl}${file.url}`" :underline="false" target="_blank">
            <span class="el-icon-document"> {{ getFileName(file.name) }} </span>
          </el-link>
          <div class="ele-upload-list__item-content-action">
            <el-link :underline="false" @click="handleDelete(index)" type="danger">删除</el-link>
          </div>
        </li>
      </transition-group> -->
    <!-- 查看 -->

    <Viewer ref="fileViewerRef" :dialog-doc="dialogDoc" />
  </div>
</template>
  
<script setup>
import { getToken } from "@/utils/auth";
import Viewer from "./viewer.vue";
const props = defineProps({
  modelValue: [String, Object, Array],
  // 数量限制
  limit: {
    type: Number,
    default: 5,
  },
  // 大小限制(MB)
  fileSize: {
    type: Number,
    default: 5,
  },
  // 文件类型, 例如['png', 'jpg', 'jpeg']
  fileType: {
    type: Array,
    default: () => ["doc", "docx", "xls", "xlsx", "ppt", "txt", "pdf"],
  },
  // 是否显示提示
  isShowTip: {
    type: Boolean,
    default: true
  },
  name: {
    type: String,
    default: 5,
  },
  disabled: {
    type: Boolean,
    default: false,
  },
});


const { proxy } = getCurrentInstance();
const emit = defineEmits();
const number = ref(0);
const uploadList = ref([]);
const baseUrl = import.meta.env.VITE_APP_BASE_API;
const uploadFileUrl = ref(import.meta.env.VITE_APP_BASE_API + "/common/upload"); // 上传文件服务器地址
const headers = ref({ Authorization: "Bearer " + getToken() });
const fileList = ref([]);
const fileUpload = ref()
let dialogDoc = ref(false);
const fileViewerRef = ref(null);
const activityId = ref(0)

const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);

watch(() => props.modelValue, val => {
  if (val) {
    let temp = 1;
    // 首先将值转为数组
    const list = Array.isArray(val) ? val : props.modelValue.split(',');
    // 然后将数组转为对象数组

    fileList.value = list.map(item => {
      if (typeof item === "string") {
        item = { name: props.name ? props.name : item, url: item, originalFilename: getFileName(item).match(/(\S*)_/)[1] + '.' + getFileName(item).split('.')[1] };
      }
      item.uid = item.uid || new Date().getTime() + temp++;

      if (typeof item == 'object') {
        item.originalFilename = getFileName(item.url).match(/(\S*)_/)[1] + '.' + getFileName(item.url).split('.')[1]
      }

      item.activityId = item.uid;
      item.id = item.uid;
      return item;
    });
  } else {
    fileList.value = [];
    return [];
  }
}, { deep: true, immediate: true });

// 上传前校检格式和大小
function handleBeforeUpload(file) {
  // 校检文件类型

  if (props.fileType.length) {
    file.id = file.uid;
    const fileName = file.name.split('.');
    const fileExt = fileName[fileName.length - 1];
    const isTypeOk = props.fileType.indexOf(fileExt) >= 0;
    if (!isTypeOk) {
      proxy.$modal.msgError(`文件格式不正确, 请上传${props.fileType.join("/")}格式文件!`);
      return false;
    }
  }
  // 校检文件大小
  if (props.fileSize) {
    const isLt = file.size / 1024 / 1024 < props.fileSize;
    if (!isLt) {
      proxy.$modal.msgError(`上传文件大小不能超过 ${props.fileSize} MB!`);
      return false;
    }
  }
  proxy.$modal.loading("正在上传文件，请稍候...");
  number.value++;
  return true;
}

// 文件个数超出
function handleExceed(files) {
  if (props.limit == 1) {
    fileUpload.value.clearFiles()
    fileUpload.value.handleStart(files[0])
    setTimeout(() => {
      fileUpload.value.submit()
    }, 0);

  } else {
    proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
  }
}

// 上传失败
function handleUploadError(err) {
  proxy.$modal.msgError("上传文件失败");
}

// 上传成功回调
function handleUploadSuccess(res, file) {
  if (res.code === 200) {
    activityId.value = file.uid
    uploadList.value.push({ name: props.name ? props.name : res.fileName, url: res.fileName, originalFilename: res.originalFilename });
    uploadedSuccessfully();
  } else {
    number.value--;
    proxy.$modal.closeLoading();
    proxy.$modal.msgError(res.msg);
    proxy.$refs.fileUpload.handleRemove(file);
    uploadedSuccessfully();
  }
}

// 删除文件
function handleDelete(index) {
  fileList.value.splice(index, 1);
  emit("update:modelValue", listToString(fileList.value));
}

// 上传结束处理
function uploadedSuccessfully() {
  if (number.value > 0 && uploadList.value.length === number.value) {
    fileList.value = fileList.value.filter(f => f.url !== undefined).concat(uploadList.value);
    uploadList.value = [];
    number.value = 0;
    emit("update:modelValue", fileList.value);


    fileList.value[0].activityId = activityId.value;
    fileList.value[0].id = activityId.value;

    if (fileList.value.length > 1) {
      fileList.value.splice(0, 1);
    }
    proxy.$modal.closeLoading();
  }
}

// 获取文件名称
function getFileName(name) {
  // 如果是url那么取最后的名字 如果不是直接返回
  if (name.lastIndexOf("/") > -1) {
    return name.slice(name.lastIndexOf("/") + 1);
  } else {
    return name;
  }
}

// 对象转成指定字符串分隔
function listToString(list, separator) {
  let strs = "";
  separator = separator || ",";
  for (let i in list) {
    if (list[i].url) {
      strs += list[i].url + separator;
    }
  }
  return strs != '' ? strs.substr(0, strs.length - 1) : '';
}
// 替换文件
function handleChange(file, List) {
  if (List.length > 1) {
    List.splice(0, 1);
    fileList.value = List;
    proxy.$modal.msgError('只能上传一个文件');
  }
  fileList.value = List
}
// 删除
const delView=(file)=>{
  fileList.value=[];
  emit("update:modelValue",[{name:file.name,url:""}]);

}
// 预览
const previewFun = (file) => {


  dialogDoc.value = true;
  let data = {};
  // 上传过的文件组成完成的网络路径
  // if (file.url) {
  //   data.src = `${baseUrl}${file.url}`;
  // }
  if (file.url&&file.url.indexOf(',')==-1) {
    data.src =`${baseUrl}${file.url}`;
    file=`${baseUrl}${file.url}`;
  }else if(file.url&&file.url.indexOf(',')!=-1){
    let src=file.split(',');
    let srcArr=[]
    src.forEach(item=>{srcArr.push(`${baseUrl}${item}`)})
    data.src = srcArr.join(',');
    file=srcArr[0]
  }

  
  const arr = file.split(".");
  const suffix = arr[arr.length - 1];
  if (suffix == "docx" || suffix == "doc") {
    fileViewerRef.value?.viewDocx(data, '公文');
  } else if (suffix == "xlsx" || suffix == "xls") {
    fileViewerRef.value?.viewXlsx(data);
  } else if (suffix == "jpg" || suffix == "jpeg" || suffix == "png") {
    fileViewerRef.value?.viewImg(data);
  } else if (suffix == "pdf") {
    fileViewerRef.value?.viewPdf(data);
  }
};




  </script>
  
  <style scoped lang="scss">
.upload-file-uploader {
  margin-bottom: 5px;
}
.upload-file-list .el-upload-list__item {
  border: 1px solid #e4e7ed;
  line-height: 2;
  margin-bottom: 10px;
  position: relative;
}
.upload-file-list .ele-upload-list__item-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: inherit;
}
.ele-upload-list__item-content-action .el-link {
  margin-right: 10px;
}
.upload-custom {
  
  width: 102px;
  height: 102px;
  overflow: hidden;
  line-height: 1.6;
  padding: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}
.upload-custom:hover .upload-mask{
  display: flex;
}
.file-size {
  font-size: 24px;
}

.upload-mask{
  display: none;
  width: 100%;
  height: 100%;
  border-radius: 6px;
  position: absolute;
  left: 0;
  top: 0;
  background: rgba(0,0,0,0.4);
  // display: flex;
  align-items: center;
  justify-content: center;
}
.upload-mask span{
  font-size: 20px;
  padding-right: 5px;
  color: #fff;
}
.upload-mask span:last-child{
  padding:0
}
</style>
  